Portable electric communication network



8, 1939- H. R. ALLENSWORTH 2,168,310

PORTABLE ELECTRIC COMMUNICATION NETWORK Filed March 27 1957 FIG IINVENTOR HARRY R ALLENSWORTH BY MM ATTORNEY Patented Aug. 8, 1939 UNITEDSTATES PATENT OFFICE Harry R. Allensworth, Columbus, Ohio ApplicationMarch 27,

16 Claims.

My invention relates to electric communication networks and moreparticularly to portable electric communication networks and has for itsobject new and novel combinations and new and novel assembly ofconstituent elements whereby all desirable communication characteristicsof non-portable networks are comprised in portable networks makingpossible and available, from and to such portable networks,communication comparable to that enjoyed by the use of the best of thecontemporaneous conventional nonportable networks.

A further object of my invention is to make available for use,particularly in emergency communication, portable communication networkspurposing high quality telephonic communication.

According to my invention these objects are attained by new and novelmeans comprising a separable and integral electric communication networkcomprising connecting means, a transformer, capacitor, signaling deviceand a tele phone hand set comprising a telephone receiver, telephonetransmitter and means of actuating said signaling device.

My invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawing forming a part of this application; with the understanding,however, that the invention is not confined to the practical applicationherein selected for purposes of illustration or to the particularnetwork or hand set therein shown nor is the invention confined to anystrict conformity with the showing of the drawing which may be changedor modified so long as such changes and/or modifications mark nomaterial departure from the salient features of the invention within thescope of the appended claims.

Illustrative of one of the important practical applications of myinvention: Let it be assumed: Properly equipped signal circuits such as,for ex ample, fire alarm signal (box) circuits, to be available; also anadequately boxed community. Police cars, motor cycles, fire departmentvehicular equipment, etc., supplied with the portable communicationnetwork herein described will be always, in the more congested areas ofthe community, within the distance of a half city block; and in outlyingsections, within one thousand feet, of communication facilitiesconnecting immediately to headquarters and, through headquarterscommunication equipment, to any telephone in the community or beyond.

This provides two-way communication between 1937, Serial No. 133,401

police radio cars, and other radio-equipped vehicular equipment, and theradio broadcasting station and/or headquarters. Upon the radio stationbroadcasting the proper call or signal the car or cars designated by thecall or signal move to the nearest signal box and immediatecommunication with headquarters and/or the radio station is established;the ensuing communication having, as compared with two-way radiocommunication, all the advantages of secrecy.

Additionally, separate telephone circuits may be provided with suitablejacks at convenient places and trouble-men, taxicabs, delivery vehicles,etc., supplied with the portable communication network herein describedwill be at all times within reasonably close proximity to communicationfacilities connecting direct to their base of operations.

Fig. 1 shows a schematic circuit diagram of a preferred arrangement ofthe invention.

Fig. 2 is a pictorial representation of the invention which pictorialrepresentation, for purpose of enhancing its illustrative value, is notdrawn to scale. Like parts bear like reference letters or numerals inboth Fig. 1 and Fig. 2.

Referring now to the accompanying drawing: Figure 1 is a schematicdelineation of one preferred type of portable electric communicationnetwork comprising telephone handset HS comprising transmitter T andreceiver R; push button switch I, actuated by push button PB; fourconductor cord 2; transformer windings Pl, P2, P3 and S; capacitor C;impulse emitter 4 here shown in the form of a short circuiting relay,which may however take the form of the well known electric buzzer; twoconductor cord 3; and suitable connecting means (clips or plug, etc.)here shown as plug 5.

Pi, P2 and P3 are three primary windings of a four winding transformer;S, the fourth winding, is secondary to Pl, P2 and P3. The three saidprimary windings together with telephone transmitter T are so connectedas to form a divided circuit bridged by condenser C at points 6 and '1.

Referring to Figure 2; HS is a telephone hand set comprising, inaddition to a telephone transmitter and telephone receiver, push buttonswitch shown as l in Figure 1. PB is a push button the operation ofwhich actuates said push putton switch. 2' is a four conductor cordconnecting the transmitter, receiver and push button switch comprised inHS and network elements contained in 8. 3 is a two conductor cordconnecting network elements contained in 8 with suitable connectingmeans here shown as plug 5. 8 is a small compact container or housing inthe form of a case, can, capsule, cartridge or the like which containerhouses and incases, in very small volume, a transformer, capacitor andimpulse emitter (one example of which is shown in Figure 1 as PI, P2,P3, S, C and 4). The total volume of this capsular container or capsuledoes not appreciably exceed seven (7.5 to 10) cubic inches. Preferably,though not necessarily, it is cylindrical or tubular in shape. Incylindrical form it would not exceed six (6) inches in length by 1.25 to1.5 inch internal diameter. The average mans hand could easilycompletely enclose it, gripped in the fist. This is the form illustratedand these are the preferred proportions. This cartridge is adapted to beinserted at any desired point in the conductor cord which normallyconnects the hand set and plug. In assembling or manufacturing theinvention in the plant the multi-conductor cord of the portabletelephone has built into it as an integral part forming a slightcylindrical enlargement the capsule containing the network, the fourwires at one end being permanently connected to corresponding conductorsin the handset portion of the cord, while the two wires at the oppositeend are permanently connected to corresponding conductors in theconnector portion of the cord. The capsule and cord are an integralstructure, the capsule constituting, actually, only a slight increase orswell in the diameter of the cord and yet containing the completeoperative network, contributing functions and operations wholly lackingand impossible without it. By combining the capsule integrally in thecord in this way the entire network assembly with all its advantages iscontributed to the cord with no dimensional change in the cord exceptthat slight increase in diameter for only a few inches of its length. Byusing a cylindrical capsular construction the cord characteristics as toshape are not changed, the ends being rounded ofi and merged in thecord, of course. In production, the capsule is built into the cord.While the cylindrical form has many advantages and is decidedly thepreferred construction, it will be understood that a similar capsule ofrectangular, elliptical, or other non-cylindrical cross section may beused. Likewise, while the dimensions of approximately 1.25 to 1.5 inchdiameter and approximately 6 inch length are preferred it will beunderstood that they may be varied considerably while still notincreasing the total capsule volume; and cord flexibility is fullymaintained.

What is claimed is:

1. In combination, a portable telephone cord and a capsule suspendedthereby and integrally built into said cord intermediate of its ends andcontaining a network establishing communication between the parts ofsaid cord.

2. In combination, a portable telephone cord and a capsule of a volumenot appreciably exceeding seven and one-half to ten cubic inchesintegrally built into said cord intermediate of its ends suspendedthereby and containing a network establishing communication between theparts of said cord.

3. In combination, a portable telephone cord provided with a slightlyenlarged portion suspended thereby intermediate of its ends, saidenlarged portion containing a network establishing communication betweenthe parts of said cord.

4. In combination, a portable telephone cord provided with a capsularenlargement suspended thereby intermediate of its ends and approximatelyconcentric with said cord, and a network in said enlargementestablishing communication between said ends.

5. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and approximately concentric therewith, and anetwork in said enlargement establishing communication between saidends.

6. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends approximately concentric therewith and having atotal volume not appreciably in excess of seven and one-half to tencubic inches and a network in said enlargement establishingcommunication between said ends.

7. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and a network in said enlargement andestablishing communication between said ends, and means controlling thefunctions of said network.

8. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and a network in said enlargement andestablishing communication between said ends, said network comprisingmeans for initiating signal impulses in said network.

9. In combination, a portable telephone cordhaving a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and a network in said enlargement andestablishing communication between said ends, said network comprisingmeans for initiating undulatory signal impulses in said network.

10. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and a network in said-enlargement andestablishing communication between said ends, said network comprisingmeans for initiating undulatory signal'impulse sequences in saidnetwork.

11. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and a network in said enlargement andestablishing communication between said ends, and means for shunting anelement of said network.

12. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate ofits ends and a network in said enlargement andestablishing communication between said ends, said network comprising atransformer and impulse emitting means.

13. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and a network in said enlargement andestablishing communication between said ends, said network comprising adivided circuit, a condenser bridging said circuit, and impulse emitting means.

14. In combination,.a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and a network in said enlargement andestablishing communication between said ends, said network comprisingimpulse emitting means, a handset in communication with said networkthrough said cord, and a switch in said handset for putting said impulseemitting means in series relation with conductor leads through saidcord.

15. In combination, a portable telephone cord having a capsularenlargement suspended thereby and integrally built thereintointermediate of its ends and an electric communication network in saidenlargement establishing communication between said ends, said networkcomprising a divided circuit, a condenser bridging said circuit, atransformer and impulse emitting means, a handset in communication withsaid network through said cord, and means carried by said handset forputting said impulse emitting means in series relation with wires ofsaid cord and one winding of said transformer and for short circuitingthe receiver of said handset and one winding of said transformer.

16. A portable telephone cord comprising a telephone network and acapsular enlargement within said cord suspended thereby and integrallybuilt thereinto and containing said network, said network establishingcommunication through said cord.

HARRY R. ALLENSWORTH.

